MPEP § 2164 — The Enablement Requirement (Annotated Rules)

§2164 The Enablement Requirement

USPTO MPEP version: BlueIron's Update: 2025-12-31

This page consolidates and annotates all enforceable requirements under MPEP § 2164, including statutory authority, regulatory rules, examiner guidance, and practice notes. It is provided as guidance, with links to the ground truth sources. This is information only, it is not legal advice.

The Enablement Requirement

This section addresses The Enablement Requirement. Primary authority: 35 U.S.C. 112(a) and 35 U.S.C. 112. Contains: 1 requirement, 2 prohibitions, 1 guidance statement, 2 permissions, and 3 other statements.

Key Rules

Topic

Determining Whether Application Is AIA or Pre-AIA

4 rules
StatutoryPermittedAlways
[mpep-2164-e5a0965ac7a78ac1f7c8ec79]
Specification Must Describe Invention Completely
Note:
The specification must describe the invention in such terms that one skilled in the art can make and use the claimed invention, ensuring meaningful communication to the interested public.

The purpose of the requirement that the specification describe the invention in such terms that one skilled in the art can make and use the claimed invention is to ensure that the invention is communicated to the interested public in a meaningful way. The information contained in the disclosure of an application must be sufficient to inform those skilled in the relevant art how to both make and use the claimed invention. However, to comply with 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, it is not necessary to “enable one of ordinary skill in the art to make and use a perfected, commercially viable embodiment absent a claim limitation to that effect.” CFMT, Inc. v. Yieldup Int’l Corp., 349 F.3d 1333, 1338, 68 USPQ2d 1940, 1944 (Fed. Cir. 2003) (an invention directed to a general system to improve the cleaning process for semiconductor wafers was enabled by a disclosure showing improvements in the overall system). Detailed procedures for making and using the invention may not be necessary if the description of the invention itself is sufficient to permit those skilled in the art to make and use the invention. A patent claim is invalid if it is not supported by an enabling disclosure.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIAClaim Subject MatterEnablement Support for Claims
StatutoryRequiredAlways
[mpep-2164-3737ac9c785f602950eda656]
Specification Must Describe How to Make and Use Invention
Note:
The specification must provide sufficient information for those skilled in the relevant art to make and use the claimed invention, but detailed procedures are not always necessary.

The purpose of the requirement that the specification describe the invention in such terms that one skilled in the art can make and use the claimed invention is to ensure that the invention is communicated to the interested public in a meaningful way. The information contained in the disclosure of an application must be sufficient to inform those skilled in the relevant art how to both make and use the claimed invention. However, to comply with 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, it is not necessary to “enable one of ordinary skill in the art to make and use a perfected, commercially viable embodiment absent a claim limitation to that effect.” CFMT, Inc. v. Yieldup Int’l Corp., 349 F.3d 1333, 1338, 68 USPQ2d 1940, 1944 (Fed. Cir. 2003) (an invention directed to a general system to improve the cleaning process for semiconductor wafers was enabled by a disclosure showing improvements in the overall system). Detailed procedures for making and using the invention may not be necessary if the description of the invention itself is sufficient to permit those skilled in the art to make and use the invention. A patent claim is invalid if it is not supported by an enabling disclosure.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIAClaim Subject MatterEnablement Support for Claims
StatutoryInformativeAlways
[mpep-2164-61d8284e3726cd02ad22ac61]
Enablement Separate From Written Description
Note:
The enablement requirement is distinct from the written description requirement, and adding a new limitation may not create an enablement problem even if it lacks descriptive support in the original disclosure.

The enablement requirement of 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, is separate and distinct from the written description requirement. Vas-Cath, Inc. v. Mahurkar, 935 F.2d 1555, 1563, 19 USPQ2d 1111, 1116-17 (Fed. Cir. 1991) (“the purpose of the ‘written description’ requirement is broader than to merely explain how to ‘make and use’”). See also MPEP § 2161. Therefore, the fact that an additional limitation to a claim may lack descriptive support in the disclosure as originally filed does not necessarily mean that the limitation is also not enabled. In other words, even if a new limitation is not described in the original disclosure, the addition of a new limitation in and of itself may not create an enablement problem provided that one skilled in the art could make and use the claimed invention with the new limitation. Consequently, such limitations must be analyzed for both enablement and description using their separate and distinct criteria.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIASupport in Original Disclosure (MPEP 2163.06)Determining AIA vs Pre-AIA Applicability (MPEP 2159)
StatutoryProhibitedAlways
[mpep-2164-09aec36dc0903ad9a7035ab8]
New Limitation Enablement Not Sole Determinant
Note:
A new claim limitation does not automatically create an enablement issue if a skilled artisan can make and use the invention with it, even if not originally described.

The enablement requirement of 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, is separate and distinct from the written description requirement. Vas-Cath, Inc. v. Mahurkar, 935 F.2d 1555, 1563, 19 USPQ2d 1111, 1116-17 (Fed. Cir. 1991) (“the purpose of the ‘written description’ requirement is broader than to merely explain how to ‘make and use’”). See also MPEP § 2161. Therefore, the fact that an additional limitation to a claim may lack descriptive support in the disclosure as originally filed does not necessarily mean that the limitation is also not enabled. In other words, even if a new limitation is not described in the original disclosure, the addition of a new limitation in and of itself may not create an enablement problem provided that one skilled in the art could make and use the claimed invention with the new limitation. Consequently, such limitations must be analyzed for both enablement and description using their separate and distinct criteria.

Jump to MPEP SourceDetermining Whether Application Is AIA or Pre-AIASupport in Original Disclosure (MPEP 2163.06)Determining AIA vs Pre-AIA Applicability (MPEP 2159)
Topic

Enablement Support for Claims

2 rules
StatutoryInformativeAlways
[mpep-2164-81e695214f6f074cdd70bec0]
Specification Must Describe Invention Completely
Note:
The specification must provide sufficient detail for one skilled in the art to make and use the claimed invention, without requiring a commercially viable embodiment.

The purpose of the requirement that the specification describe the invention in such terms that one skilled in the art can make and use the claimed invention is to ensure that the invention is communicated to the interested public in a meaningful way. The information contained in the disclosure of an application must be sufficient to inform those skilled in the relevant art how to both make and use the claimed invention. However, to comply with 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, it is not necessary to “enable one of ordinary skill in the art to make and use a perfected, commercially viable embodiment absent a claim limitation to that effect.” CFMT, Inc. v. Yieldup Int’l Corp., 349 F.3d 1333, 1338, 68 USPQ2d 1940, 1944 (Fed. Cir. 2003) (an invention directed to a general system to improve the cleaning process for semiconductor wafers was enabled by a disclosure showing improvements in the overall system). Detailed procedures for making and using the invention may not be necessary if the description of the invention itself is sufficient to permit those skilled in the art to make and use the invention. A patent claim is invalid if it is not supported by an enabling disclosure.

Jump to MPEP SourceEnablement Support for ClaimsEnablement Requirement (MPEP 2164)Claims Directed To
MPEP GuidanceRecommendedAlways
[mpep-2164-91b99f41df22e9d187b5cb36]
Claims Must Be Supported by Description
Note:
If claimed subject matter is only in the claims and not described in the specification, the specification must be objected to for lacking support.

Furthermore, when the limitation is not described in the specification portion of the application as filed but is in the claims, the limitation in and of itself may enable one skilled in the art to make and use the claimed invention. When claimed subject matter is only presented in the claims and not in the specification portion of the application, the specification should be objected to for lacking the requisite support for the claimed subject matter using form paragraph 7.44. See MPEP § 2163.06. This is an objection to the specification only and enablement issues should be treated separately.

Jump to MPEP SourceEnablement Support for ClaimsPatent Application Content
Topic

Test of Enablement (MPEP 2164.01)

2 rules
StatutoryProhibitedAlways
[mpep-2164-b3e4ce1116bbfac980d9ba1f]
Description Must Permit Skilled Persons to Make and Use Invention
Note:
The specification must describe the invention in sufficient detail so that skilled persons can make and use it without undue experimentation.

The purpose of the requirement that the specification describe the invention in such terms that one skilled in the art can make and use the claimed invention is to ensure that the invention is communicated to the interested public in a meaningful way. The information contained in the disclosure of an application must be sufficient to inform those skilled in the relevant art how to both make and use the claimed invention. However, to comply with 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, it is not necessary to “enable one of ordinary skill in the art to make and use a perfected, commercially viable embodiment absent a claim limitation to that effect.” CFMT, Inc. v. Yieldup Int’l Corp., 349 F.3d 1333, 1338, 68 USPQ2d 1940, 1944 (Fed. Cir. 2003) (an invention directed to a general system to improve the cleaning process for semiconductor wafers was enabled by a disclosure showing improvements in the overall system). Detailed procedures for making and using the invention may not be necessary if the description of the invention itself is sufficient to permit those skilled in the art to make and use the invention. A patent claim is invalid if it is not supported by an enabling disclosure.

Jump to MPEP SourceTest of Enablement (MPEP 2164.01)How to Use the Invention (MPEP 2164.01(c))Enablement Support for Claims
MPEP GuidancePermittedAlways
[mpep-2164-25734318424386647cad1c9a]
Claims Must Be Supported by Description
Note:
If a limitation is in the claims but not described in the specification, the specification must be corrected to include support for that claim.

Furthermore, when the limitation is not described in the specification portion of the application as filed but is in the claims, the limitation in and of itself may enable one skilled in the art to make and use the claimed invention. When claimed subject matter is only presented in the claims and not in the specification portion of the application, the specification should be objected to for lacking the requisite support for the claimed subject matter using form paragraph 7.44. See MPEP § 2163.06. This is an objection to the specification only and enablement issues should be treated separately.

Jump to MPEP SourceTest of Enablement (MPEP 2164.01)Enablement Support for Claims
Topic

How to Make the Invention (MPEP 2164.01(b))

1 rules
StatutoryInformativeAlways
[mpep-2164-87b178de02c12c5a704e5e2d]
Specification Must Describe How to Make and Use Invention
Note:
The specification must provide detailed information enabling one skilled in the art to make and use the invention as defined by the claims.

The enablement requirement refers to the requirement of 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph that the specification describe how to make and how to use the invention. The invention that one skilled in the art must be enabled to make and use is that defined by the claim(s) of the particular application or patent.

Jump to MPEP SourceHow to Make the Invention (MPEP 2164.01(b))How to Use the Invention (MPEP 2164.01(c))Enablement Support for Claims
Topic

Scope Commensurate with Disclosure

1 rules
StatutoryRequiredAlways
[mpep-2164-743e07737ddf1e1584e3232f]
Claims Must Be Enabled by Description
Note:
The invention defined in the claims must be described in the specification such that a skilled artisan can make and use it.

The enablement requirement refers to the requirement of 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph that the specification describe how to make and how to use the invention. The invention that one skilled in the art must be enabled to make and use is that defined by the claim(s) of the particular application or patent.

Jump to MPEP SourceScope Commensurate with DisclosureEnablement Support for ClaimsEnablement Requirement (MPEP 2164)
Topic

Claims Directed To

1 rules
StatutoryInformativeAlways
[mpep-2164-d6c0a77d7630c0340f385c68]
Invention Must Be Described Clearly
Note:
The specification must describe the invention in such terms that one skilled in the art can make and use it, ensuring sufficient disclosure of improvements to the overall system.

The purpose of the requirement that the specification describe the invention in such terms that one skilled in the art can make and use the claimed invention is to ensure that the invention is communicated to the interested public in a meaningful way. The information contained in the disclosure of an application must be sufficient to inform those skilled in the relevant art how to both make and use the claimed invention. However, to comply with 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, it is not necessary to “enable one of ordinary skill in the art to make and use a perfected, commercially viable embodiment absent a claim limitation to that effect.” CFMT, Inc. v. Yieldup Int’l Corp., 349 F.3d 1333, 1338, 68 USPQ2d 1940, 1944 (Fed. Cir. 2003) (an invention directed to a general system to improve the cleaning process for semiconductor wafers was enabled by a disclosure showing improvements in the overall system). Detailed procedures for making and using the invention may not be necessary if the description of the invention itself is sufficient to permit those skilled in the art to make and use the invention. A patent claim is invalid if it is not supported by an enabling disclosure.

Jump to MPEP SourceClaims Directed ToScope Commensurate with DisclosureMethod/Process Claims
Topic

Claims

1 rules
StatutoryInformativeAlways
[mpep-2164-9c21208dfc722bf2f9757448]
Claims Must Be Supported by Description
Note:
A patent claim is invalid if it does not have sufficient description in the specification to enable one skilled in the art to make and use the invention.

The purpose of the requirement that the specification describe the invention in such terms that one skilled in the art can make and use the claimed invention is to ensure that the invention is communicated to the interested public in a meaningful way. The information contained in the disclosure of an application must be sufficient to inform those skilled in the relevant art how to both make and use the claimed invention. However, to comply with 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, it is not necessary to “enable one of ordinary skill in the art to make and use a perfected, commercially viable embodiment absent a claim limitation to that effect.” CFMT, Inc. v. Yieldup Int’l Corp., 349 F.3d 1333, 1338, 68 USPQ2d 1940, 1944 (Fed. Cir. 2003) (an invention directed to a general system to improve the cleaning process for semiconductor wafers was enabled by a disclosure showing improvements in the overall system). Detailed procedures for making and using the invention may not be necessary if the description of the invention itself is sufficient to permit those skilled in the art to make and use the invention. A patent claim is invalid if it is not supported by an enabling disclosure.

Jump to MPEP SourceEnablement Support for ClaimsEnablement Requirement (MPEP 2164)
Topic

35 U.S.C. 112(a) – Written Description & Enablement

1 rules
StatutoryInformativeAlways
[mpep-2164-28737a43b1f443b71d224195]
Enablement Is Separate From Written Description
Note:
The enablement requirement for a patent claim is distinct from the written description requirement, meaning lack of descriptive support does not automatically imply lack of enablement.

The enablement requirement of 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, is separate and distinct from the written description requirement. Vas-Cath, Inc. v. Mahurkar, 935 F.2d 1555, 1563, 19 USPQ2d 1111, 1116-17 (Fed. Cir. 1991) (“the purpose of the ‘written description’ requirement is broader than to merely explain how to ‘make and use’”). See also MPEP § 2161. Therefore, the fact that an additional limitation to a claim may lack descriptive support in the disclosure as originally filed does not necessarily mean that the limitation is also not enabled. In other words, even if a new limitation is not described in the original disclosure, the addition of a new limitation in and of itself may not create an enablement problem provided that one skilled in the art could make and use the claimed invention with the new limitation. Consequently, such limitations must be analyzed for both enablement and description using their separate and distinct criteria.

Jump to MPEP Source35 U.S.C. 112(a) – Written Description & EnablementAIA vs Pre-AIA PracticeDisclosure Requirements
Topic

Support in Original Disclosure (MPEP 2163.06)

1 rules
StatutoryPermittedAlways
[mpep-2164-f1627862ad02e94ffa67060c]
Written Description Requirement Is Separate From Enablement
Note:
The written description requirement for claims is distinct from enablement, meaning a new claim limitation lacking descriptive support does not automatically lack enablement if it can still be made and used by one skilled in the art.

The enablement requirement of 35 U.S.C. 112(a) or pre-AIA 35 U.S.C. 112, first paragraph, is separate and distinct from the written description requirement. Vas-Cath, Inc. v. Mahurkar, 935 F.2d 1555, 1563, 19 USPQ2d 1111, 1116-17 (Fed. Cir. 1991) (“the purpose of the ‘written description’ requirement is broader than to merely explain how to ‘make and use’”). See also MPEP § 2161. Therefore, the fact that an additional limitation to a claim may lack descriptive support in the disclosure as originally filed does not necessarily mean that the limitation is also not enabled. In other words, even if a new limitation is not described in the original disclosure, the addition of a new limitation in and of itself may not create an enablement problem provided that one skilled in the art could make and use the claimed invention with the new limitation. Consequently, such limitations must be analyzed for both enablement and description using their separate and distinct criteria.

Jump to MPEP SourceSupport in Original Disclosure (MPEP 2163.06)Determining Whether Application Is AIA or Pre-AIADetermining AIA vs Pre-AIA Applicability (MPEP 2159)

Citations

Primary topicCitation
35 U.S.C. 112(a) – Written Description & Enablement
Claims
Claims Directed To
Determining Whether Application Is AIA or Pre-AIA
Enablement Support for Claims
How to Make the Invention (MPEP 2164.01(b))
Scope Commensurate with Disclosure
Support in Original Disclosure (MPEP 2163.06)
Test of Enablement (MPEP 2164.01)
35 U.S.C. § 112
35 U.S.C. 112(a) – Written Description & Enablement
Claims
Claims Directed To
Determining Whether Application Is AIA or Pre-AIA
Enablement Support for Claims
How to Make the Invention (MPEP 2164.01(b))
Scope Commensurate with Disclosure
Support in Original Disclosure (MPEP 2163.06)
Test of Enablement (MPEP 2164.01)
35 U.S.C. § 112(a)
35 U.S.C. 112(a) – Written Description & Enablement
Determining Whether Application Is AIA or Pre-AIA
Support in Original Disclosure (MPEP 2163.06)
MPEP § 2161
Enablement Support for Claims
Test of Enablement (MPEP 2164.01)
MPEP § 2163.06
Enablement Support for Claims
Test of Enablement (MPEP 2164.01)
Form Paragraph § 7.44

Source Text from USPTO’s MPEP

This is an exact copy of the MPEP from the USPTO. It is here for your reference to see the section in context.

BlueIron Last Updated: 2025-12-31